From owner-freebsd-net Fri Feb 22 3:27: 7 2002 Delivered-To: freebsd-net@freebsd.org Received: from shuttle.wide.toshiba.co.jp (shuttle.wide.toshiba.co.jp [202.249.10.124]) by hub.freebsd.org (Postfix) with ESMTP id 5B3E037B400 for ; Fri, 22 Feb 2002 03:27:02 -0800 (PST) Received: from localhost (kame201.kame.net [203.178.141.201]) by shuttle.wide.toshiba.co.jp (8.11.6/8.9.1) with ESMTP id g1MBQro86175; Fri, 22 Feb 2002 20:26:53 +0900 (JST) Date: Fri, 22 Feb 2002 20:26:52 +0900 Message-ID: From: JINMEI Tatuya / =?ISO-2022-JP?B?GyRCP0BMQEMjOkgbKEI=?= To: Bart Matthaei Cc: freebsd-net@FreeBSD.ORG Subject: Re: mtu on gif devices In-Reply-To: <20020207220346.I68508@heresy.dreamflow.nl> References: <20020207220346.I68508@heresy.dreamflow.nl> User-Agent: Wanderlust/2.7.5 (Too Funky) Emacs/21.1 Mule/5.0 (SAKAKI) Organization: Research & Development Center, Toshiba Corp., Kawasaki, Japan. MIME-Version: 1.0 (generated by SEMI 1.14.3 - "Ushinoya") Content-Type: text/plain; charset=US-ASCII X-Dispatcher: imput version 980905(IM100) Lines: 36 Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org Sorry for the delayed response, >>>>> On Thu, 7 Feb 2002 22:03:46 +0100, >>>>> Bart Matthaei said: > The weird thing is, though, that since i've upgraded to 4.5, ssh > connections from my irix and bsd box in my network (which have > public ip's tunneled from work) die spontaniously. They either die > when i give it a lot of input, or when i idle for a bit. It smells > like a mtu problem to me, but i can't find the problem. > When i ssh directly from my router trough the tunnel to work, i get a > stable connection, so i figured the home-router itself is the source > of the problem. > Set up is like this: > colo (gif with mtu 1500) -> gif tunnel -> home-router (gif with mtu > 1500/ interfaces with mtu 1500) -> irix box (mtu 1200) / bsd box (mtu > 1500). > Both the irix and bsd box have the problem. > The problem was also occuring when the mtu of both gif devices were > set to 1280. > It all started when i upgraded my home router from 4.4 to 4.5. How did you configure (particularly the default) routes on the host "colo"? I've seen several reports that the default route on a tunnel link has somehow become bogus. BTW: if the problem happens regardless of the MTU value, the MTU setting may not be the reason. JINMEI, Tatuya Communication Platform Lab. Corporate R&D Center, Toshiba Corp. jinmei@isl.rdc.toshiba.co.jp To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message